I am new to Mac, very new, and I am having a big problem. I downloaded some fonts because I do graphic design, and i went and deleted all of the fonts i don't use that were already on the Mac. (Big mistake i guess) Anyways, now my whole system is going crazy. i can't open certain apps. My Dock wont show up. I can't even find the trashcan. Can someone please tell me how to save my Mac?